UMI Performance 4020-R Rear Lower Control Arms Lift Bars Weld-In

The UMI Performance 4020-R rear lift bars are engineered to replace factory rear control arms on GM vehicles, delivering improved traction and launching performance without altering ride height. These weld-in control arms work with axle torque to load the chassis, forcing the rear wheels downward and pushing the tires into the pavement for harder launches and improved 60-foot times.

Key Features:

• Boxed control arms CNC machined from 1/8-inch wall USA mild steel tubing for maximum strength
• CNC laser-cut mounting brackets with 3/16-inch thickness for precise fitment
• Adjustable control arm angle using 3-hole mounting design (2-inch, 2-3/4-inch, or 3-1/4-inch drop settings)
• MIG welded bushing holders with greaseable polyurethane bushings to reduce deflection while maintaining street comfort
• Reinforced sway bar mounting holes with 1/8-inch wall thickness steel sleeves TIG welded in place
• Sway bar holes positioned to keep the bar level with the rear end in the lowest setting
• Durable powder coat finish for corrosion resistance
• Grade 8 mounting hardware included

Installation: This is a weld-in application. Mounting brackets are supplied in bare metal for easy welding. Complete hardware and detailed installation instructions are included. For a bolt-in setup, see UMI Performance P/N 4022.

Performance Benefits: These lift bars are specifically designed to correct lost suspension geometry and instant center on lowered vehicles while reducing unwanted wheel hop. The adjustable design allows you to dial in the optimal suspension angle for your setup. For maximum rear suspension performance, pair with UMI adjustable upper control arms.